Functional Coverage
A kind of coverage supported in language syntax and measured in verification tools to reflect the desire expressed in a Verification Plan to apply particular test stimulus and checks to a DUT in order to fully verify it. Items in a Verification Plan can map to named/grouped functional coverage points which are defined in the language. SystemVerilog code can trigger those measurements by evaluating a specified triggering condition, and can report a data value which is recorded in a preset manner, for subsequent reporting. Functional Coverage is a key part of today's constrained random methodology, where the test intent is specified in the set of functional coverage points defined and measured in the context of random stimulus application, not in a set of manually directed tests with their own stimulus and checks.
